//
//  MainTabBar.swift
//  SinaWeiBo
//
//  Created by yz on 16/1/29.
//  Copyright © 2016年 yz. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {
    
    override init(frame: CGRect) {
        
        super.init(frame: frame)
        
        setupUI()
        
    }

    required init?(coder aDecoder: NSCoder) {
//        fatalError("init(coder:) has not been implemented")
        
        super.init(coder: aDecoder)
        
        setupUI()

    }
    
    private func setupUI()
    {
        addSubview(composeBtn)
    }
    
    override func layoutSubviews() {
        
        super.layoutSubviews()
        
        let w = self.bounds.width/5
        let h = self.bounds.height
        let rect = CGRect(x:0, y:0, width:w, height:h)
        
        var index :CGFloat = 0
        
        for subview in subviews{
            
            if subview.isKindOfClass(NSClassFromString("UITabBarButton")!){
             
                subview.frame = CGRectMake(index * w, 0, w, h)
                index++
                
                if index == 2{
                    index = 3
                }}
            
        }
        
        composeBtn.frame = CGRectOffset(rect, w * 2, 0)
        bringSubviewToFront(composeBtn)
        
    }
    
    lazy var composeBtn:UIButton = {
        
        let btn = UIButton()
        
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: UIControlState.Normal)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        
        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)
        btn.sizeToFit()
        
        return btn;
    }()

}
